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I need help with Geometry.

I need help with calculating the area of polygons. 

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Katherine P. | Shoreview Area Math Tutoring and Test PrepShoreview Area Math Tutoring and Test Pr...
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What type of polygon?

Here are some examples:

Area of a triangle = 1/2 (base x height)

Area of a rectangle = length x width

Area of a parallelogram = base x height